A tool kit for the design of superconducting programmable gate arrays

[摘要] ENGLISH ABSTRACT: The development of a tool kit for the design of superconducting programmable gatearrays (SPGAs) is discussed. A circuit optimizer using genetic algorithms is developedand evaluated. Techniques and a program are also developed for the generation ofsegmentized 3D models with which to calculate inductance in circuit structures throughFastHenry. The ability to add random variations to the dimensions of the models isincluded. These tools are then used to design novel latching elements that allow theconstruction of reprogrammable Rapid Single Flux Quantum (RSFQ) circuits. A circularprocess is used, whereby layouts are converted back to circuit diagrams through elementextraction, and reoptimized if necessary. Two programmable frequency dividers are thendesigned; one for testing the routing and switch structures and programming architectureof an SPGA, and another compact one for testing the latching elements and off-chipinterface. The dissertation concludes with an overview of the circuits necessary for theimplementation of a fully functional SPGA.

[发布机构] Stellenbosch University